Apparatus for feeding lime to water.



- F. B. LEO PULD & G. A. BR APPARATUS FOR FEEDING LIME TO WATER.

PATENTED JUNE 18, 1907.

OWN.

APPLIOATION FILED JULY 13. 1906.

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WITNESSES.

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. PATENTED JUNE 18, 1907.

F. B. LEOPOLD & 0. A. BROWN. APPARATUS FOR FEEDING LIME TQ WATER.

APPLICATION FILED JULY 13. 1906.

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UNITED sTATEs PATENT OFFICE.

FREDERICK B. LEOPOLI), OF EVANSTON, ILLINOIS, AND CHARLES ARTHUR BROWN,OF LORAIN, OHIO; SAID LEOPOLD ASSIGN OR TO PITTSBURGH FILTERMANUFACTURING COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OFPENNSYLVANIA.

APPARATUS FOR FEEDING LIME TO WATER.

Specification of Letters Patent.

Patented June 18, 1907.

Application filed July 13, 1906. Serial No. 325,986.

T at whom/7126 may concern.-

Be it known that we, FREDERICK B. LEO- POLD, a resident of Evanston, inthe county of Cook and State of Illinois, and CHARLES ARTHUR BROWN, aresident of Lorain, in the county of Lorain, State of Ohio, haveinvented a new and useful Improvement in Apparatus for Feeding Lime toWater; and

we do hereby declare the following to be afull, clear, and exactdescription thereof.

Our invention relates to apparatus for feeding lime to water in theprocess of purifying or softening water.

The object of our invention is to provide I g apparatus for theintroduction of the lime in proper proportion to the amount of water tobe treated, and readily adjustable so that the quantity of lime may bevaried to suit different conditions.

To these ends our invention comprises, generally stated, a suitablereceptacle for the lime in the form of a paste, a tank or reservoirs forthe water, and means for introducing measured quantities of said lime tosaid 2 5 water in a positive and accurate manner.

To enable others skilled in the art to make and use our invention wewill explain the same more fully, referring to theaccompanying drawingsin which Figure 1 is a sectional elevation of our improved apparatus;Fig. 2 is a crosssection on line 22 Fig. 1 Fig. 3 is a detail of theconveyer; Fig. 4 is a detail of sprocket and conveyer; and Fig. 5 is amodified form; Fig. 6 3 5 is a horizontal section on line 66, Fig. 5;

Fig. 7 is a detail of one of the pistons.

Like numerals indicate like parts in each of the figures.

The numeral 2 designates a suitable bin, 4.0 or receptacle, adapted tocontain lime paste of a certain known strength or consistency. Supportedwithin said bin 2 is the hollow shaft 3 with the beveled cog 4 at theupper end thereof with which the bevel pinion 5 on 4.5 the shaft 6meshes. A stirrer 7 is secured to the shaft 3, said stirrer comprisingthe radiating arms 8 connected by the vertical strips 9. At the lowerend of the bin 2 is the hopper 10 with the circular outlet 11. Acylinder or 5 conduit 12 projects downwardly from the outlet 1.1 intothe tank 13 containing the water to be treated. The lower end of thecylinder 12 is outwardly flaring. A conveyer 14 carries pistons orflights 15 secured at suitable intervals to the cable 16. The cable 16has the balls 17 secured thereto at intervals, said balls being adaptedto engage correspondingly shaped recesses 18 in the sprocket wheels 19,20 and 21. Said sprocket wheels are further provided with the recesses22 which receive the pistons 15. The conveyer 14 engages the sprocketwheels 19, 20 and 21 as shown, the sprocket wheel 21. acting to drivesaid conveyer and being mounted on the drive shaft 23 connected up bythe belt 24 to any suitable motor. The pistons 15 011 the conveyer 14pass down through the bin 2 and through the cylinder 12 into the tank 13and so convey the limepaste from said bin to said tank in measuredquantities.

Within the tank 13 is the downwardly projecting baffle 25 which extendsbelow the water level and opposite the inlet 26 so that the waterentering said tank is deflected downwardly by said bafile. The purposeof this baflle 25 is to increase the velocity of the inflowing water anddirect it with full force against the sprocket wheel 21 so as to flushsaid wheel and wash off any of the lime paste adhering thereto. Thisprevents the said wheel from becoming clogged so as to inter fere withthe engagement of the conveyer therewith. Furthermore, the pistons 15are washed at the same time and the adhering paste removed therefrom. Asa further precaution against the paste adhering to the pistons weprovide the spraying apparatus which comprises the bell-shapedreceptacle 27 within which are supported the circular spray pipes 28connected up to the supply pipe 29. The water from these spray pipes 28is directed toward the pistons passing through said receptacle and thepaste washed therefrom passes back into the tank 13. A cylinder 30 mayextend for a short distance from the upper end of the receptacle 27 toreceive the pistons where the tank 13 is closed to operate underpressure.

A baflle 31 in the tank 13 separates the main portion of the tank fromthe outlet 32.

From the upper end of the baffle 31 a perforated plate 33 eXtends to thewalls of the tank and forms a strainer. At the bottom of the tank 13 isa valve controlled outlet for removing the deposit in the form ofcarbonates.

When our improved apparatus is in use the lime-paste of a known strengthis introduced into the bin 2 and the water to be treated is admitted tothe tank 13 in determined quantities. Power is then applied to operatethe conveyer 14. As the conveyer passes through the lime-paste in thebin 2 the pistons carry with them into the cylinder 12 a fixed anddefinite amount of lime or just so much as may be contained between twocontiguous pistons. The distance apart of the pistons controls-theamount and when once it has been determined the proper proportion oflime to be admitted to correspond to the quality of the water and thequantity to be treated the pistons are located accordingly. If thequantity of lime is to be changed or introduced in diiIerent proportionsthe pistons may be readily adjusted accordingly. In this manner theproportion of lime to be introduced may be determined with greataccuracy and when once fixed the apparatus works without furthersupervision. The movement of the pistons is positive and sure so thatthere is practically no liability of deviation.

The manner of introducing the water to the tank 13 together with thespray pipes 28 wash the pistons and remove the adhering paste and insuresubstantially all the lime finding its way into the water.

In Fig. 5 we have illustrated a modified form of our invention in whichthe pistons 35 operate horizontally in the cylinders 36. The pistons areconnected up to piston rods 37 which are secured to the double crankshaft 38. The pistons operate alternately so that the lime is alwaysbeing introduced to the water in the tank. The pistons 35 may have ashorter or longer movement by changing the stroke of the piston rods. Inthe same manner as above a fixed quantity of the limepaste is added tothe water on each stroke of the piston.

IVhat we claim is:

1. In apparatus of the character described, the combination of asuitable lime-paste receptacle, a water tank communicating therewith,means for subdividing the lime paste, and means for feeding suchsubdivisions successively to said water tank.

2. In apparatus of the character described, the combination of alime-paste receptacle, a water reservoir communicating therewith, and aseries of pistons operating in succession to feed the lime-paste to saidreservoir.

3. In apparatus of the character described, the combination of alime-paste receptacle, a water reservoir communicating therewith, anendless conveyer carrying pistons, and means for moving said conveyerthrough said receptacle and into said reservoir.

4. In apparatus of the character described, the combination of alimepaste receptacle, a water reservoir, a cylinder and a series ofpistons adapted to enter said cylinder and feed the paste to saidreservoir.

5. In apparatus of the character described, the comblnation of alime-paste receptacle, a water reservoir communicating therewith, acylinder, and endless conveyer carrying pistons adapted to pass throughsaid cylinder and feed the paste to said reservoir.

6. In apparatus of the character described, the combination of alime-paste receptacle, a water reservoir connnunicating therewith, anendless conveyer carrying a series of pistons adapted to feed thepaste'to said reservoir, and means for spraying said pistons.

7. In apparatus of the character described, the combination of alime-paste receptacle, a water reservoir communicating therewith,'anendless conveyer carrying a series of pistons adapted to feed the pasteto said reservoir, a receptacle through which said pistons pass, andmeans for spraying said pistons therein.

8. In apparatus of the character described, the combination of alime-paste receptacle, a water reservoir communicating therewith, anendless conveyer carrying a series of pistons ada ted to feed the pasteto said reservoir, a ba ie in said reservoir extending below the inletthereto, and said conveyer extending down adjacent to the lower end ofsaid baffle.

9. In apparatus of the character described, the combination of alime-paste receptacle, a water reservoir communicating therewith, anendless conveyer carrying a series of pistons adapted to feed the pasteto said reservoir, a receptacle through which said pistons pass, saidreceptacle having an enlarged portion, a spray pipe in said enlargedportion, and a contracted portion leading from said receptacle.

10. In apparatus of the character described, the combination of a limepaste receptacle, a water reservoir communicating therewith, acontracted extension or tube extending from said lime paste receptacledown into the water in said tank, an endless conveyer carrying pistons,and means for moving said conveyer through said lime paste receptacleand said tube.

In testimony whereof, we, the said FRED- ERICK B. LEOPOLD and CHARLES A.BROWN, have hereunto set our hands.

FREDERICK B. LEOPOLD. CHARLES ARTHUR BROWVN.

itnesses as to Leopold:

S. H. JoNEs, ROBERT C. ToTTEN.

Witnesses as to Brown:

WVM. L. IIUeHEs, LOTTIE CLAwsoN.

